Nitrox Certification. Questions with
Correct Verified Answers. Latest 2026-
2027. Graded A
A mixture of nitrogen and oxygen in which the percentage of oxygen is
greater than that found in air is generally called: - ANSall
Additional steps Nitrox divers can take to help avoid oxygen toxicity include
all of the following except: - ANSNever exceed a PO2 of 2.0.
Decompression diving involves more risk than no-decompression diving,
and without the proper precautions can become extremely hazardous. -
ANStrue
Decompression sickness usually occurs when you have an excess amount
of __________ in your body and you ________ too quickly. - ANSNitrogen,
asend
Dive computers work by: - ANSCalculating the approximate amount of
excess nitrogen present in your body, based on factors such as depth and
time.
During any 24-hour period, you can be exposed to a Nitrox mixture at its
Maximum Operating Depth (MOD) for up to: - ANS150 Min
1
,EAN32 is a good choice for Nitrox diving because it provides a good
combination of safety and extended bottom time. - ANSTrue
f you do not set your dive computer's FO2 prior to every dive: - ANSall
First aid for decompression sickness can include: - ANSTreating for shock.,
Administering pure oxygen.
How can a dive computer help you avoid decompression sickness? - ANS-
When you use a dive computer, it will calculate approximately the amount
of nitrogen absorbed by your body, and indicates when it is time to ascend
and the rate at which it is safest to ascend.
If you go too deep or stay too long, you may not be able to make a direct
ascent to the surface without substantially increasing your risk of
decompression sickness. - ANSTrue
It is important for team members to be use the same Nitrox mixture so that
they will share a common MOD. - ANStrue
Nitrox is still relatively rare at most dive destinations and liveaboards. -
ANSfalse
Once a diver suspected of suffering from decompression has been
transported to a medical facility, proper treatment will primarily involve
recompression in a hyperbaric chamber. - ANSTrue
2
, Oxygen toxicity is a physiological reaction of your body that occurs when
you are exposed to breathing mixtures containing: - ANSHigh partial
pressures of oxygen, Lower partial pressures of oxygen for extended
periods
Regulators that will be exposed to oxygen concentrations of less than 40
percent need no special preparation unless required by manufacturer's
specifications or local laws/regulations. - ANSTrue
State how long, in any 24-hour period, you can be exposed to a Nitrox
mixture at its Maximum Operating Depth (MOD)? - ANS-Also, over the
course of a 24-hour period, you will have a cumulative time limit for oxygen
exposure at the maximum operating depth of two and a half hours in any
24-hour period.
The air we normally breathe consists primarily of: - ANSNitrogen + Oxygen
The maximum partial pressure of oxygen (PO2) we use in Nitrox diving is: -
ANSnone
The maximum percentage of oxygen that sport divers use in a Nitrox
mixture is: - ANS40%
The maximum recommended depth for using 100 percent oxygen is 6 m/20
ft. - ANSTrue
3
Correct Verified Answers. Latest 2026-
2027. Graded A
A mixture of nitrogen and oxygen in which the percentage of oxygen is
greater than that found in air is generally called: - ANSall
Additional steps Nitrox divers can take to help avoid oxygen toxicity include
all of the following except: - ANSNever exceed a PO2 of 2.0.
Decompression diving involves more risk than no-decompression diving,
and without the proper precautions can become extremely hazardous. -
ANStrue
Decompression sickness usually occurs when you have an excess amount
of __________ in your body and you ________ too quickly. - ANSNitrogen,
asend
Dive computers work by: - ANSCalculating the approximate amount of
excess nitrogen present in your body, based on factors such as depth and
time.
During any 24-hour period, you can be exposed to a Nitrox mixture at its
Maximum Operating Depth (MOD) for up to: - ANS150 Min
1
,EAN32 is a good choice for Nitrox diving because it provides a good
combination of safety and extended bottom time. - ANSTrue
f you do not set your dive computer's FO2 prior to every dive: - ANSall
First aid for decompression sickness can include: - ANSTreating for shock.,
Administering pure oxygen.
How can a dive computer help you avoid decompression sickness? - ANS-
When you use a dive computer, it will calculate approximately the amount
of nitrogen absorbed by your body, and indicates when it is time to ascend
and the rate at which it is safest to ascend.
If you go too deep or stay too long, you may not be able to make a direct
ascent to the surface without substantially increasing your risk of
decompression sickness. - ANSTrue
It is important for team members to be use the same Nitrox mixture so that
they will share a common MOD. - ANStrue
Nitrox is still relatively rare at most dive destinations and liveaboards. -
ANSfalse
Once a diver suspected of suffering from decompression has been
transported to a medical facility, proper treatment will primarily involve
recompression in a hyperbaric chamber. - ANSTrue
2
, Oxygen toxicity is a physiological reaction of your body that occurs when
you are exposed to breathing mixtures containing: - ANSHigh partial
pressures of oxygen, Lower partial pressures of oxygen for extended
periods
Regulators that will be exposed to oxygen concentrations of less than 40
percent need no special preparation unless required by manufacturer's
specifications or local laws/regulations. - ANSTrue
State how long, in any 24-hour period, you can be exposed to a Nitrox
mixture at its Maximum Operating Depth (MOD)? - ANS-Also, over the
course of a 24-hour period, you will have a cumulative time limit for oxygen
exposure at the maximum operating depth of two and a half hours in any
24-hour period.
The air we normally breathe consists primarily of: - ANSNitrogen + Oxygen
The maximum partial pressure of oxygen (PO2) we use in Nitrox diving is: -
ANSnone
The maximum percentage of oxygen that sport divers use in a Nitrox
mixture is: - ANS40%
The maximum recommended depth for using 100 percent oxygen is 6 m/20
ft. - ANSTrue
3
